This playbook gets the epel release repo, removes nginx if present,installs nginx and restart it via the notify event handler
playbook.yml
---
- hosts: webservers
become: yes
become_user: root
tasks:
- name: epel-release
yum:
name: epel-release
state: present
- name: remove nginx
yum:
name: nginx
state: absent
- name: nginx install
yum:
name: nginx
state: latest
notify: restart nginx
handlers:
- name: restart nginx
service:
name: nginx
state: restarted
Create a role
sudo ansible-galaxy init base_httpd
this will create a folder structure like
base_httpd - defaults - files - handlers - meta - README.md - tasks - templates - tests - vars
tasks/main.yml
---
# tasks file for base_httpd
- name: install httpd
yum:
name: httpd
state: latest
- name: start httpd
service:
name: httpd
state: started
- name: copy index file
copy:
src: /home/vagrant/roles/base_httpd/files/index.html
dest: /var/www/html
mode: 0644
notify: restart httpd
handlers/main.yml
---
- name: restart httpd
become: yes
become_user: root
service:
name: httpd
state: restarted
files/index.html
<html>
<body>
<h1>
Hello World Test!
</h1>
</body>
</html>
sudo ansible-galaxy install cloudalchemy.prometheus
this is installed in /etc/ansible/roles
now create a playbook named ansible-playbook prometheus.yml to run this
---
hosts: webservers
roles:
- cloudalchemy.prometheus
then run
ansible-playbook prometheus.ymlthis will install prometheus, test using curl
curl http://localhost:9090sudo ansible-galaxy install cloudalchemy.alertmanager
now create a playbook named ansible-playbook alertmanager.yml to run this
---
hosts: webservers
roles:
- cloudalchemy.alertmanagerthen run
ansible-playbook alertmanager.yml
location is /etc/ansible/roles/cloudalchemy.alertmanager/templates these 2 templates need to be as below so then only alert manager service seems to start
create directories for alertmanager data storage
mkdir data
cd /daata
mkdir alertmanager
alertmanager.service.j2
[Unit]
Description=Prometheus Alertmanager
After=network-online.target
StartLimitInterval=0
StartLimitIntervalSec=0
[Service]
Type=simple
PIDFile=/var/run/alertmanager.pid
User=alertmanager
Group=alertmanager
ExecReload=/bin/kill -HUP $MAINPID
WorkingDirectory=/etc/alertmanager/
ExecStart=/usr/local/bin/alertmanager --config.file=/etc/alertmanager/alertmanager.yml --web.external-url http://localhost:9093 --storage.path=/data/alertmanager
SyslogIdentifier=alertmanager
Restart=always
RestartSec=5
CapabilityBoundingSet=CAP_SET_UID
LockPersonality=true
NoNewPrivileges=true
MemoryDenyWriteExecute=true
PrivateTmp=true
ProtectHome=true
ReadWriteDirectories=/var/lib/alertmanager
RemoveIPC=true
RestrictSUIDSGID=true
{% if alertmanager_systemd_version | int >= 232 %}
PrivateUsers=true
ProtectControlGroups=true
ProtectKernelModules=true
ProtectKernelTunables=yes
ProtectSystem=strict
{% else %}
ProtectSystem=full
{% endif %}
[Install]
WantedBy=multi-user.target
{{ ansible_managed | comment }}
global:
resolve_timeout: {{ alertmanager_resolve_timeout | quote}}
{% for key, value in alertmanager_smtp.items() %}
smtp_{{ key }}: {{ value | quote }}
{% endfor %}
{% if alertmanager_slack_api_url | length %}
slack_api_url: {{ alertmanager_slack_api_url | quote }}
{% endif %}
{% if alertmanager_http_config | length %}
http_config:
{% endif %}
{% for key, value in alertmanager_http_config.items() %}
{{ key }}: {{ value | quote }}
{% endfor %}
templates:
- '{{ alertmanager_config_dir }}/templates/*.tmpl'
{% if alertmanager_receivers | length %}
receivers:
{{ alertmanager_receivers | to_nice_yaml(indent=2) }}
{% endif %}
{% if alertmanager_inhibit_rules | length %}
inhibit_rules:
{{ alertmanager_inhibit_rules | to_nice_yaml(indent=2) }}
{% endif %}
route:
{{ alertmanager_route | to_nice_yaml(indent=2) | indent(2, False) }}
{% if alertmanager_child_routes | length %}
routes:
{{ alertmanager_child_routes | to_nice_yaml(indent=2) | indent(2, False) }}
{% endif %}
sudo systemctl status alertmanager
curl http://localhost:9093